JavaScript Game-Developer

The customer is an agency in Berlin. They are looking for a javascript developer for an end customer. The end customer want's to develop a small web-based game on their website.

The game should include the following features:
- Pong clone with illustrative skin
- Single player
- The goal is to play the ball back in an element
- If you miss, the ball bounces back
- Difficulty increases over time due to more balls and higher speed
- Mobile First with support for desktop (touch, keyboard, mouse)
- Adaptation to different mobile screen sizes up to iPhone 8 Plus (fixed size, what goes beyond)

WebGL or Canvas are beneficial in addition to Java Script. The project was estimated by the customer to be 25 man-days. The start date is asap.